Caican Cai created CALCITE-6438: ----------------------------------- Summary: Add optimization to returns empty when the filter operator is a false instance Key: CALCITE-6438 URL: https://issues.apache.org/jira/browse/CALCITE-6438 Project: Calcite Issue Type: New Feature Components: core Affects Versions: 1.37.0 Reporter: Caican Cai Fix For: 1.38.0
{code:java} select * from emp where false{code} The current logical plan in calcite is {code:java} LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8]) LogicalFilter(condition=[false]) LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code} It can be optimized to {code:java} LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8]) LogicalValues(tuples=[[]]) {code} -- This message was sent by Atlassian Jira (v8.20.10#820010)